fix some sqlite errors.

__mocks__/expo-sqlite.js

@@ -1,44 +0,0 @@
-// __mocks__/expo-sqlite.js
-const sqlite3 = require('sqlite3').verbose();
-
-class SQLiteDatabase {
-  constructor(name) {
-    this.db = new sqlite3.Database(':memory:');
-  }
-
-  runAsync(sql, params = []) {
-    return new Promise((resolve, reject) => {
-      this.db.run(sql, params, function (err) {
-        if (err) {
-          reject(err);
-        } else {
-          resolve({ changes: this.changes });
-        }
-      });
-    });
-  }
-
-  execAsync(sql) {
-    return new Promise((resolve, reject) => {
-      this.db.exec(sql, err => {
-        if (err) {
-          reject(err);
-        } else {
-          resolve();
-        }
-      });
-    });
-  }
-
-  closeAsync() {
-    return new Promise(resolve => {
-      this.db.close(() => resolve());
-    });
-  }
-}
-
-const SQLite = {
-  openDatabaseAsync: jest.fn(name => new SQLiteDatabase(name)),
-};
-
-module.exports = SQLite;